A bicycle includes a frame, a charging circuit carried by the frame and configured to capture energy associated with movement of the bicycle, a power module carried by the frame, and a switch disposed electrically between the charging circuit and power module. The power module, in response to an indication that the bicycle is travelling downhill, closes the switch to enable energy transfer between the charging circuit and power module.

A shopping cart that generates power, and comprising a shopping cart body; a set of wheels that each rotates about an axle coupled to the shopping cart body; a power generator that generates a source of power from a rotational force of the wheels when a user moves the shopping cart; a voltage regulator that controls the source of power output from the power generator; and an outlet for outputting the controlled power to an electronic device.

A electric motor system for supplying assistive propelling power to a bicycle, comprising: one or more drivetrains, each comprising a motor-drive shaft having a pinion with fixed drive system driving a crown and bearing assembly connected to a spindle; and a controller for executing a motor control sequence comprising: an initial state activated by a rider's start command where the motor speed is being detected for an initial period, and if the motor speed is higher than a first speed threshold continuously for a first period, then the motor is turned on to output a rider-selected torque level; a continuous motor speed detection state where the motor speed is being continuously detected, and if the motor speed falls below a second speed threshold continuously for a second period, then the motor is turned off; and the motor is turned off if a stop command from the rider is received.

A system and method for mechanically coupling an energy harvester to strength training type exercise equipment is disclosed. An energy harvester with unwanted vibration forces is mechanically isolated from exercise equipment by a system comprising a plurality of mechanically compliant vibration isolators and a ballast mass; a flexible cord, pre-loaded with a near constant force spring is used to transmit motion from the weight stack to the energy harvester; the flexible cord has a force limiting feature to pre-excessive force from being transmitted from the energy harvester to the weight stack during an exercise motion.

The present invention provides a generator for a bicycle which can be applied to a rim of all kinds of bicycle wheels, comprising: a rotating body 30 which is arranged to be adjacent to or to make contact with the rim 10, wherein eddy current induction magnet 35 is installed along an outer circumferential surface of the rotating body 30; a rotation shaft 62 whose one side end part is fixed at a center of the rotating body 30; and a generation unit 60 which is arranged at the other side end part of the rotation shaft 62, wherein at least a portion of the outer circumferential surface of the rotating body 30 is arranged farther outside than an outer circumferential surface of the eddy current induction magnet 35. 21

In order to improve the performance of a battery power supply unit for a bicycle electronic device at low atmospheric temperature, when its temperature is less than or equal to a lower temperature threshold, electrical energy is supplied by the power supply unit to a heating element thermally coupled with the power supply unit that, in this way, self-heats. Part of the electrical energy of the power supply unit can be simultaneously supplied to the electronic device.